Electrical Engineering Stack Exchange
Electrical Engineering Stack Exchange

Questions tagged [single-phase]

AC power with two legs run 180 degrees out of phase

Single-phase AC power is primarily found in residential markets. However, it is still used in industrial environments, usually remote installations where the cost to run a 3-phase line is prohibitive.

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Why is North American residential power called single phase?

I am under the belief that North American residential power is a special case of two phase power adequately described by the term split phase. Clearly I am in the minority and want to be convinced otherwise but have not found any convincing…
9Harris
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What capacitor(s) will be best replacement

Living and working in West Africa. We cannot purchase capacitors here, we can only beg (and pay) used parts from the workshops which rewind electrical motors. Our gray-water-pump is broken, the always-connected run capacitor is dead. It is a simple…
Martin Zaske
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Single-phase to 3-phase conversion

I have seen some boxes (with some capacitor circuits inside) which do single-phase power supply to 3-phase power supply conversion. The problem with them is that they cause the load motor to heat up, because the phase difference between the legs is…
vivek
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Single phase 3-speed AC motor won't start spinning or spins in wrong direction

I have a Danby DPAC8399 air conditioner, and its fan motor started acting strangely. Sometimes, it it will only do a hum and won't start, and other times it will do that hum for a few seconds and then start in the wrong direction. I can help the…
Jean-François Beauchamp
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Help with (very) odd single phase motor wiring

I think this is my first post here. I have little knowledge on AC motors, and this machine I am servicing (an old Balltrap/Clay target shooting machine) left me baffled. The below diagram is a simplification of the wiring for the motor that arms the…
garvamel
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Can I hook up a single phase switch to an electric wood splitter?

Good day. I have a 5 ton Yardmax electric wood splitter that I would like to add a single pole foot pedal switch. Right know there is a Kedu HY56 switch built in. The motor has 4 wires (2 blue, 2 red). The blue wires are hooked up to a capacitor.…
Mike Joostema
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An overseas company is making a machine for me and they need to know whether I want 1,2 or 3 phase and what voltage

I'm in Quebec and the company making the machine is in China. The machine is an industrial sized T-Shirt sublimation machine that does two sided printing. So there's a large heated plate that is pneumatically pressed down on to another equally sized…
Doug Henning
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Does a 230 V (240 V) single-phase motor technically draw twice as much current as the label states?

I've always thought P = U * I (units watt, volt and ampere, respectively), but I ran across this discussion on a forum: If you look in your panel there are 2 “hot wires coming in from the pole”. 1 is the 120v A phase and 1 is the 120v B phase.…
rob
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What can be the consequences of a smaller airgap in a induction motor for the efficiency and rotor current?

Last year I bought 3 motors from a junkyward, and one of them was a 1/4 hp, 4 pole single-phase induction motor made by WEG for an Electrolux washing machine. Or at least it was supposed to be, cause most were disassembled and thrown in a pit, so I…
user2934303
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What is the purpose of the capacitors in this motor controller? Why is one smaller than the other?

I recently purchased a few single phase 230V motorised hoists and I want to understand their wiring and how they work. I can more or less follow what's going on, I just don't fully understand why certain things are being done. What are the…
Tomalele
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How do utility lines wire transformers to go from 3-phase power to residential split phase?

I'm trying to understand how power distribution lines go from 3-phase to single-phase and haven't been able to find a concrete explanation. I understand that power companies transmit with 3-phase power (delta usually) at 60 kV and above, eventually,…
MindXpert
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Does the dropper between the catenary wire and contact wire carry current?

From my observations, droppers are of metal and they do not have any insulation from the catenary wire or from the contact wire. The catenary and contact both carry the same phase and voltage so any voltage drop that occurs in the contact wire can…
Ankit Kumar Vishwakarma
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IC for converting single phase to three phase

I want to design a device to control a 0.5 HP to 3.0 HP three phase AC motor with single AC power. I need to able converting single phase to three phase. Also an three phase ac motor controller should be added. Is there any IC and modules for…
mehdi
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Ceiling Fan Speed Control stripped down

I am a novice but know enough to get by. I was given an older Hunter Fan that is only operated via Remote. I have cut the receiver out because I do not have the remote and from what I have read they are problematic and discontinued. The fan has…
Douglas Pescatore
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How do single phase BLDC motors start in proper direction?

There are descriptions on internet of the single phase BLDC motors which are powered by Vdc (such as PC cooling fans 12V). Interestingly pictures shown describing outrunner type with equal number of poles and stator coils (usually 4 both). One…
VladBlanshey
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